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1. 重庆医科大学附属第一医院放射科,重庆,400016
2. 重庆市第三人民医院放射科,重庆,400014
纸质出版日期:2014,
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王思杭, 吕发金, 曾勇明, 等. 双源螺旋CT大螺距Flash模式在肺动脉CTA成像技术中的应用[J]. 重庆医科大学学报, 2014,38(10):1494-1499.
Wang Sihang, Lyu Fajin, ZENG Yongming, et al. Application of dual-source spiral CT with high-pitch flash mode in CT pulmonary angiography[J]. Journal of Chongqing Medical University, 2014,38(10):1494-1499.
王思杭, 吕发金, 曾勇明, 等. 双源螺旋CT大螺距Flash模式在肺动脉CTA成像技术中的应用[J]. 重庆医科大学学报, 2014,38(10):1494-1499. DOI:
Wang Sihang, Lyu Fajin, ZENG Yongming, et al. Application of dual-source spiral CT with high-pitch flash mode in CT pulmonary angiography[J]. Journal of Chongqing Medical University, 2014,38(10):1494-1499. DOI:
目的:探讨双源螺旋CT大螺距Flash模式、时间-密度曲线测试技术在肺动脉CT成像(computer tomography pulmonary angiography,CTPA)中运用的可行性。方法:将拟行CTPA检查的60例患者随机分为2组。对照组采用单源常规模式扫描,对比剂示踪技术。实验组采用双源大螺距Flash模式扫描,时间-密度曲线测试技术。对比剂均采用400 mgI/ml碘迈伦,其余扫描参数均相同。扫描结束后,将原始数据传至后处理工作站进行处理,分别采用图像质量评分及CT值、对比噪声比评价图像质量。结果:实验组及对照组共60例病人均成功完成CTPA检查,2组一般资料如性别、年龄、身高、体质量均无明显统计学差异(P值分别为0.752,0.605,0.319,0.523);实验组对比噪声比高于对照组(P值分别为0.028,0.030,0.001,0.012,0.020),2组肺动脉干、左右上肺动脉、左右下肺动脉CT值均无统计学差异(P值分别为0.362,0.986,0.373,0.584,0.931),实验组升主动脉、左右上肺静脉、左右下肺静脉CT值均低于对照组,差异有统计学意义(P值分别为0.000,0.001,0.000,0.003,0.000),且实验组的图像质量评分优于对照组( χ2=12.25,P=0.016; χ2=7.53,P=0.023);实验组对比剂用量(24 ml vs. 50 ml)和辐射剂量[(5.27±1.94) mSv vs. 7.30±2.73) mSv]低于对照组(P=0.011),实验组扫描时间明显短于对照组[(0.94±0.07) s vs. (4.71±0.37) s,P=0.000]。结论:在CTPA检查中,双源CT大螺距Flash模式、时间-密度曲线测试技术不仅能采集到理想的肺动脉影像,而且降低了患者的辐射剂量及对比剂用量,还有效缩短了患者的屏气时间。
Objective:To explore the feasibility of dual-source spiral CT with high-pitch flash spiral mode as well as time-density curve in diagnosing the clinically suspected pulmonary embolism(PE). Methods:Sixty patients planed to receive CT pulmonary an-giography(CTPA) were randomly divided into two groups. Routine scan and bolus tracking monitoring were used in control group,while dual-source spiral CT with high-pitch flash spiral mode as well as time-density curve was used in experimental group. Contrast agents Iodine diftler with the concentration of 400 mgI/ml was applied in both groups. The parameter of CT scanning was the same in both groups. All CT original dates were transferred to Siemens workstation and were post-processed by VR,MIP,MPR and CPR tech-nology. The CTPA image quality was evaluated based on score of image quality,CT value,and contrast to noise ratio(CNR). Results:All patients in two groups completed CTPA successfully. There was no difference in baseline characters including sex,age,height and weight between the two groups(P=0.752,0.605,0.319,0.523). CNR of experimental group was higher than that of control group(P=0.028,0.030,0.001,0.012,0.020). There was no difference in CT value of pulmonary artery trunk,RSPA,RIPA,LSPA and LIPA between the two groups(P=0.362,0.986,0.373,0.584,0.931),but CT value of the ascending aorta,RSPV,RIPV,LSPV and LIPV were lower in experimental group than in control group(P=0.000,0.001,0.000,0.003,0.000). Scores of image quality were better in experimental group than in control group(χ2=12.25,P=0.016; χ2=7.53,P=0.023). Both the contrast agents(24 ml vs. 50 ml) and radi-ation dose[(5.27±1.94) mSv vs. (7.30±2.73) mSv] were lower in experimental group than in control group(P=0.011). The scanning time was significantly shorter in experimental group than in control group[(0.94±0.07) s vs. (4.71±0.37) s,P=0.000)]. Conclusion:CTPA with flash spiral mode and time-density curve could col-lect the satisfied image,reduce patients’ contrast agents and radiation dose,and decrease the breathless time.
肺动脉X线计算机对比剂血管造影术
pulmonary arteryX-ray computercontrast agentangiography
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